Passes toolstash-check.

Change-Id: I0cb2ea9ca7ec2449999af28457270ff7b3324e92
Reviewed-on: https://go-review.googlesource.com/41410
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>